BRAKE light on 2001 S40

BRAKE light comes on sometimes, stays on for length of a drive. Turning off, waiting 20 seconds and restarting doesn't make it go away, but a few hours later I start it and it's out.

What does this mean?

Reply to
et
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Probably a faulty switch that responds to braking fluid pressure. I had that on a Saab, and didn't notice it until the light burned long enough to run my battery down.

Reply to
Marvin

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